Police have said Carter walked up to May's car in the 7800 block of Burke Street on the night of Oct. 19, leaned against the driver's door, spoke to May, then got into the front passenger seat. Billy arrived, and climbed into the backseat of the car, directly behind May in the driver's seat.

Witnesses reported hearing four gunshots almost immediately.

The two men fled. May suffered a close-range gunshot wound to the right side of his head, and died at the hospital less than two hours later.

Carter's fingerprints were found on the car.

Slain UNO student Valan May, 24provided by family

Two weeks before the murder, the same pair stole a roofer's truck together, police said. Their fingerprints were also found on the recovered vehicle. They have also been tied to an Uptown home invasion and a separate armed robbery.

Police have said they are members of the "Marley Gang," a group of kids and young adults in eastern New Orleans connected to a rash of recent violent crimes, including May's murder, a September carjacking and a number of armed robberies.

Both teenagers are being held at Orleans Parish Prison on a $1.25 million bond.